One examples of internal stimuli

hunger signal a need for more energy and clauses an animal to search for food.

one example of external stimuli

the sound of a predator can cause an animal to hide.

what is meant by circadian rhythm ?

a daily cycle or activity observed in many organism.

how do animals decide when to begin and end hibernation ?

most hibernate in a den all winter , some animals hibernate on the summer it all depends on the animal.

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chapter 27 sect1

animals and adaptations and behaviors

Question	Answer

One examples of internal stimuli	hunger signal a need for more energy and clauses an animal to search for food.
one example of external stimuli	the sound of a predator can cause an animal to hide.
what is meant by circadian rhythm ?	a daily cycle or activity observed in many organism.
how do animals decide when to begin and end hibernation ?	most hibernate in a den all winter , some animals hibernate on the summer it all depends on the animal.